IDL [=promise type=] represents.

</p>

<div class=note>

When converting a JS value to a <code>Promise&lt;T></code> IDL value,

first the value is wrapped in an (IDL) Promise,

then later machinery ensures the promise correctly resolves

to a value of type <code>T</code>.

This means that, for example,

a method defined to take a <code>Promise&lt;T></code> argument

will automatically accept both {{Promise}} objects

(which must eventually resolve to a <code>T</code> object)

and <code>T</code> objects themselves.

(It will also, initially, accept <em>any other</em> type of object,

but will eventually auto-reject the promise

for resolving to the wrong type.)

</div>

<h5 id="js-promise-manipulation" oldids="es-promise-manipulation">Creating and manipulating Promises</h5>

<div algorithm>